Resistant vehicle or automobile brake



March 26, 1929. s. POWERS 1,706,8 9

RESISTANT VEHICLE OR AUTOMOBILE BRAKE mm mm l2, L925 a sheats-fiheet 1 /29- ig a 39 \30 ji'vfjvfolr' s.- POWERS 1,706,899

March 26, 1929.

RESISTANT VEHICLE 0R AUTOMOBILE BRAKE 2 Sheets-Sheet. 2

Filed Oct. 12, 1925 l NVENTOR Sun/[I70 Powers ATTORNE Y Patented Mar. 26, 1929.

UNITED STATES SURVILAN POYVEBS, OF WATERBURY, CONNECTICUT.

RESISTANT VEHICLE OR AUTOMOBILE BRAKE.

Application filed October 12, 1925. Serial No. 62,030.

This invention relates to vehicles, and more particularly to an improved brake mechanism for an automobile.

One object of this invention is to provide a brake mechanism constructed of all metal parts and having no brake linings which re quire to'be renewed.

A further object is to provide a brake construction in which screeching and other disagreeable noises which accompany the use of friction brakes will be eliminated.

A further object is to provide a vehicle brake of the above nature which will be relatively simple in construction, inexpensive to manufacture, easy to install and manipulate, and very eliicicnt' and durable in use.

With these and other objects in view, there has been illustrated on the accompanying drawings, one form in which the invention may be conveniently embodied in practice.

Fig. 1 represents an end view of the brake as it appears in assembled position.

Fig. 2 is a side sectional view of the same.

Fig. 3 represents end and side views respectively of the cam for expanding the interior sectional brake disc, this figure as well as Figs. 4i to 9 inclusive being drawn on a smaller scale than Figs. 1 and 2.

Fig. i represents end and side views respec tively of the sectional brake disc.

Fig. 5 represents end and side Views respectively of the brake drum.

Fig. ('5 represents end and side views respectively of the foot-operated brake band which is located on the exterior of the brake drum Fig. 7 represents end and side views respective] y of the outer frame for housing the expanding disc and cam mechanism.

Fig. 8 represents end and side views respectively of the bell-cranklever for contracting the brake band.

Fig. 9 represents side and end views respectively of the foot-operated brake arm for actuating the bell-crank lJIZLkG-(JOlltl'ttChOl' lever.

Fig. 10 is an enlarged sectional end view taken on the line 1010 of Fig. 2, looking in the direction of the arrows.

Referring now to the drawings in which like reference nun'ierals denote corresponding parts throughout the several views, the numeral 10 indicates an interior axle shaft having a tapered outer end 11 upon the end of which is secured a not 12 for holding a imaged eater cap member 13 position.-

Surronnding the shaft 10 is an axle tube 1-1, and as clearly shown in Fig. 2, the spokes 15 of the vehicle wheel are firmly held in position between said outer cap member 13 and an inner arched plate member 16 by means of bolts 17 having nuts 18 on their inner ends.

The arched plate member 16 forms the front section of a double-acting brake dram,

generally indicated by the numeral 17 and comprising a pair of parallel annular plates 19 and 20. The plates 19 and. 20 are provided with bearings for rotatably receiving four outer rollers 21 and four inner rollers 22. Each of said rollers has its ends reduced for fitting within a correspond ing number of circular apertures in d plates 19 and 20. The four outer rollers 21 are located with their axes in a circle of such a diameter that the outer edges of said rollers will project outwardly beyond the outer edge of the brake drum 17. The four inner rollers 22 are also located with their axes on a circle, but in this instance said circle is of such a diameter that the inner rollers will project inwardly be yond the inner edge of the'brake drum 17.

The outer rollers 21 are adapted to form a bearing for a foot-operated split brake band 23 which surrounds said rollers and is socured, as by a lug 24, to a lug 2 1 on the frame 32, to be described later, said lugs being joined by a rivet 24.". The ends of the brake band. 23 are interlitted by a tongue and slot connection 25 as clearly shown in Fig. (3, this construction allowing the band 23 to engage the drum rollers 21 throughout its circumference.

In order to permit the brake band 23 to be contracted into tight engagement with the outer rollers 21 of the drum 17, provision is made of a pair of short rods 26 and 27 riveted tangentially to the band 23 adj accnt its ends. The short rods 26 and 27 have their outer ends adj nstably secured, as by interiorly threaded tubular members 28 and 29 to a bellcrank contractor lever 30, most clearly shown in Fig. 8. The bell-crank lever 30 is rigidly secured to a shaft 31 journaled within a two-part frame 32 to be hereinafter more fully described. The other end of the shaft 31 has rigidly secured thereto a brake-operating arm adapted to be connected by a rod 34.- to a foot-operated pedal, not shown.

The en'iergency brake for the automobile comprises an expanding disc of three complementary sections 35, 36, and. 37, each of said sect-ices having a zireular outer periphery and being provided n'iid'way between'itsend with a T-shaped radial recess 38 forslida'hle engagement With a similarly shaped lug v39 formed on the outer casing-'32.; Each-of the sections 35, 36, and 37 is provided on its interior edge with an arcua'te recesstO'shaped to" fit an elongated convex lug ll formed on the exterior of a cam 42 slidably located Within I 1h order to protect the front of the rollers "21 a'nd22 froin'dust, etc., provision isn'iade of a- Coy'er plate 46' lying outside the drum Jlate 20.; Thr'ee'sets of clip'n'1enibers'47 and 48 re also pfovidedon the frame 32't'or holdthe outer brake hand inproper position.

' Iii-operation, when thedriver desires to 0pv erate the foot'hral ie, lie Will pres's" his foot upon theifobt pedal, not shown; causing the rod 34 tO-be pi'tlled' to the right as Viewed in Fig. 1, thereby rotating arin33 and the he'll-crank team-actor lever 30. This Willcausethe sh'ort rods2 6 and 27' tohe pulled toii ard each other whereby the brake band 23will he'contract'ed and will exert suff cient pi'essure upon the set of four outer roll'ers'QI to retard the car to'the desirede xtent. I 7 p 7 p p I the d" is; desires to operate the emergency brake either alonejoi in conjunction with the foot brake, he tvill pull'up'on the emergency let er, notshoii n, causing the rod 45" tote pulled tothe right, as viewed in Fig 1*. lhis' will produce clockwise rotationof tlie"cain42', the three curved lug sj 41 of which Will then'force the sections 35, 3t), and 37" of the expanding disc to move"outwardly intocoiitactjwitli theset of four inner rollers 22, said sections 35; 36; and 37 being guidedin their'mawm radial movei'nent by the interlocking T-shaped'rec esses' and'liigs 3S and 39.

The expansion of the three-part disc will biting the sections thereof into eng ageliient n itli'the inner set of rollers 2 2 on the brake druin'l7 tli'erelljy (ii-resting the desired retardatioii'of the Wheels andvehicl.

h VVh'l'e there has been dis'clbsed iri'this' specisameness forinfilin hieh the invention may be embodied, it is to'beunderstood' that this for-1n isshon nfo'r the purpose'of illustration only, and that the invention is not to be limited to the specific disclosure but. may be modified and embodied in various other forms without departing from its spirit. in short, the" invention includes all the modifications and embodiments coming within the scope of the following claims;

Having thus fully described the invention \ihat is claimed as new, and for which it is desired to secure Letters Patent is:

.1. In a yehicle brake, a drum member adapted tote secured to a wheel efthe vehicle, saiddriunmember having a plurality of rollers journaled therein and extending: beyond the inner and outer peripheries thereof, a contracting brake band surroundin; said drum member, expanding brake means inside thereof, and means for selectively operating said contracting and expanding brake n'leans independently or together.

2. In a vehicle brake, a drmn member adapted to be secured to a wheel 0 t the vehicle, a set of rollers journaled in said drmn member and'extelnlinp beyond the outer periphery thereof, a contracting brake band surrounding said drum member, expanding brake nieans' inside thereof, and means for selectively operating said'coi'itract'ing and ex 'iandiug brake means independently or together.

3. In a Vehicle brake, a drum member adapted to he'securd'to a wheel of the veh iele, a set of rollers j'ournaled in said drum memher and extending beyond the inner )eriphery thereof, a contracting brake band surrounding said druin member, expanding brake means inside thereof, and means for selectively operating said contracting and expanding brake means independently or together.

4. In a vehicle brake, a drum member adapted to he sei'ured to a nhe'el of the vehicle, said drum member comprising a pair of parallel side annularplates, two sets of alternately arranged rollers jouriialed behi'een said plates the rollers of one set extendheyond the outer periphery of said plates the rollers of the other set extending beyond the inner periphery of said plates, and braking liie'i'uils for selectively engaging; said outerzind'inn'er rollers.

SURVILA'N Pownus.

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